According to a study conducted by the US Centers for Disease Control and Prevention (CDC), the circumcision rate for newborn infant males in the United States has fallen sharply over the past several years. In 2009, only 32.5% of male infants born in the United States were circumcised, down from 56% in 2006.

Circumcision rates have been falling in the United States since the 1970s. In the 1980s, over 80% of newborn male infants were circumcised. However by 2007, data from the American Academy of Pediatrics showed that less than half of male infants born in the United States were circumcised. This trend has continued, and the number of circumcisions performed has been steadily dropping every year. According to the most recent projections released by the CDC, it is estimated that 70-75% of the boys born in the United States in 2010 will remain uncircumcised.

Notably, there is some regional variation in circumcision rates. The western United States has by far the lowest rate of infant circumcision, far below the national average of 32.5% in 2009. Circumcision rates tend to be higher in areas with significant Jewish and Muslim populations, as both of those religions have traditionally viewed circumcision as a religious practice.